Evaluation of environmental noise by analyzing faint random vibration in structural health monitoring
Evaluation of environmental noise by analyzing faint random vibration in structural health monitoring
复制标题
通过分析结构健康监测中的微弱随机振动来评估环境噪声
DOI：
10.1121/1.4969133
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发表时间：
2016
影响因子：
2.4
通讯作者：
Yoshinori Takahashi
中科院分区：
文献类型：
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作者：
Yoshinori Takahashi
一次大地震之后经常会发生一些间歇性的大余震。即使一座建筑物可以避免在第一次主震中倒塌，也不能保证建筑物可以在余震中幸存下来。但是，如果能够利用由风、弱地震、交通噪音等环境噪音引起的微弱的随机振动来持续监视建筑物的状况，那么受害者的安全应该会更有保障。在机械诊断领域中，虽然已经提出了几种基于环境噪声的使用振动的诊断方法，但是这些方法要求噪声的特性是已知的，因为对象的共振被环境噪声谱遮蔽。本文提出了一种时不变传递函数中隐含共振的突出方法，并通过分析环境噪声引起的微弱随机振动，将该方法应用于结构健康监测。本报告介绍了结果…
A number of big intermittent aftershocks often follow a great earthquake. Even if a building could avoid collapse by the first main quake, there would be no guarantee that the building can survive from the aftershocks. However, if it is possible to monitor the condition of the building constantly using some faint random vibration caused by environmental noise such as wind, weak earthquakes, and traffic noise, the safety of the victims should be more secured. In a field of machinery diagnostics, although several diagnostic methods using vibration based on environmental noise have been proposed, those methods require that the characteristics of the noise are known since the resonance of the object is shadowed by the environmental noise spectrum. The author has proposed an emphasizing method of hidden resonances in a time-invariant transfer function and has also applied the method to structural health monitoring by analyzing faint random vibration caused by environmental noise. This report presents the resul...